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Recognised as Colour

#287EB9

  • #287EB9
  • Blue
  • Dark
  • Nearest: Steel blue

#287EB9 is a blue with RGB values 40, 126, 185 and HSL 204°, 64%, 44%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#287EB9#287EB9
HEX#287EB9
RGBrgb(40, 126, 185)
RGB (0–1)0.1569, 0.4941, 0.7255
RGB percentages15.7%, 49.4%, 72.5%
HSLhsl(204.4, 64.4%, 44.1%)
HSV / HSBhsv(204.4, 78.4%, 72.5%)
CMYK78.4%, 31.9%, 0%, 27.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,653,881
CSS custom property--colour: #287EB9;

Brightness & contrast

Relative luminance0.18876WCAG 2.x, 0 is black and 1 is white
Perceived brightness117 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.78:1
Contrast with white4.4:1WCAG normal text: Fail
Contrast with black4.78:1WCAG normal text: AA
Greyscale equivalent#707070
Inverted#D78146

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6280BCno red cones; affects about 1% of men; ΔE 11.5 from the original
Deuteranopia#4E72B8no green cones; the most common form, about 1% of men; ΔE 13.6 from the original
Tritanopia#008C93no blue cones; rare, and affects men and women equally; ΔE 35 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.4:1WCAG large text: AA
Contrast with black, large text4.78:1WCAG large text: AAA

Named colours

Steel blue · ΔE 6.3Cornflower blue · ΔE 21.2Deep skyblue · ΔE 26Light slate grey · ΔE 27.7Slate grey · ΔE 27.8Dodgerblue · ΔE 30.4
Nearest named CSS colourSteel blue (#4682B4)ΔE 6.29, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B96328
Analogous#28B9AB, #2836B9
Triadic#B9287E, #7EB928
Split complementary#B92836, #B9AB28
Tetradic#AB28B9, #B96328, #36B928

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BCDBF1
Lighter +30%#92C5E8
Lighter +20%#69AEDE
Lighter +10%#3F98D5
Darker −10%#1F618F
Darker −20%#164565
Darker −30%#0D283B
Darker −40%#040C11
More saturated +25%#0C83D5
Less saturated −25%#44799D

Channel breakdown

R40
G126
B185
Red40 (15.7%)
Green126 (49.4%)
Blue185 (72.5%)
Hue204.41°
Saturation (HSL)64.44%
Lightness44.12%
Dominant channelBlue
Hex per channelR 28 · G 7E · B B9

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Every value on this page was computed from “287eb9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.